Question

${2x}^{2} + 19x + 9$

Answer 1

${2x}^{2} + 19x + 9 \\ {2x}^{2} + (18 + 1)x + 9 \\ {2x}^{2} + 18x + x + 9 \\ 2x(x + 9) + 1(x + 9) \\ (2x + 1)(x + 9)$

Answer 2

Hope it helps you  ...